What happens when two positive charges come in contact with each other?
They repel.
100
What is the rate at which charges move through a conductor called?
Current
100
This type of circuit has two or more paths connected to the voltage source.
What is a parallel circuit?
100
On a magnet, where will the magnetic force be the greatest?
Near a magnet's poles
100
This is defined as the rate at which electrical work is done.
What is Electric Power?
200
Which particle inside of the atom is negatively charged?
Electron
200
______________ is the opposition posed by a material to the flow of current.
a. Voltage
b. Resistance
c. Charge
d. Ampere
b. Resistance
200
Batteries typically have
a. two positive terminals
b. two negative terminals
c. one positive and one negative terminal
d. no terminals
c. one positive and one negative terminal
200
This is a region where a magnetic force can be detected
What is a magnetic field?
200
This type of circuit forms a single path. If one bulb in this circuit blows, the circuit will be open.
What is a Series Circuit?
300
Whether or not charges will move in a material depends on how tightly__________ are held in the atoms of the material.
a. electrons
b. neutrons
c. protons
d. resistors
a. electrons
300
What is the SI unit for potential difference?
Volts
300
The resistance of an insulator is
a. absent
b. very low
c. moderate
d. high
d. high
300
The strength of a magnetic field created by current in a wire can be increased by
a. using shorter wire
b. decreasing the current in the wire
c. using longer wire
d. wrapping the wire into coil
d. wrapping the wire into coil
300
This device is used to open or close an electric circuit.
What is a Switch?
400
When a glass rod is rubbed with silk and becomes positively charged,
a. electrons are removed from the rod
b. protons are added to the silk
c. protons are removed from the silk
d. the silk remains neutral
a. electrons are removed from the rod
400
What is the SI unit of resistance?
Ohm
400
Appliances connected so that they form a single pathway for charges to flow are connected in a(n)
a. series circuit
b. parallel circuit
c. open circuit
d. closed circuit
a. series circuit
400
Increasing the number of coils in a solenoid or an electromagnet results in a _______ magnetic field.
a. weaker
b. stronger
c. perpendicular
d. parallel
b. stronger
400
This device contains a metal strip that melts when a certain current is exceeded.
What is a Fuse?
500
A(n) __________ is a solution that conducts electricity.
a. electrode
b. terminal
c. voltage
d. ampere
a. electrode
500
Resistance is caused by
a. kinetic energy
b. proton charge
c. internal friction
d. electron charge
c. internal friction
500
What device protects a circuit from current overload? (hint: it might be in your basement)
Circuit Breaker
500
What is the name of the naturally occurring magnetic rock found by the ancient Greeks?
Lodestone
500
The geographic North Pole DOES NOT align exactly with this.